X-ray computed tomography of a gas-sparged stirred-tank reactor
- 作者：Jason J. Ford ; Theodore J. Heindel ; Terrence C. Jensen ; Joshua B. Drake
- 关键词：Hydrodynamics ; Multiphase flow ; Stirred-tank reactor ; Tomography ; Visualization ; Voidage
- 刊名：Chemical Engineering Science
- 出版年：2008
- 期刊代码：18_00092509
- 类别：ce
- 出版时间：April 2008
- 卷：63
- 期：8
- 页码：2075-2085
- 文件大小：2055 K
摘要
X-ray computed tomography (CT) is used to explore the differences in gas dispersion in a stirred-tank reactor (STR) for different operating conditions by varying the impeller speed and gas flow rate. X-ray imaging has been carried out in a 0.21 m ID acrylic STR equipped with a nylon Rushton-type impeller. From the CT images, major differences in local gas holdup are observed for different operating conditions. Completely dispersed conditions have a relatively uniform holdup profile while flooded conditions show a high gas holdup near the impeller shaft. The high resolution of the X-ray system allowed fine details such as recirculation regions behind the baffles to be visualized.